Adding Recon-only attachments
Quite simple really, just a suggestion to add class-specific attachments in general, but as a start the easiest one would be the Recon class.
First off, giving recon access to higher magnification optics than other classes with the same weapons, and other regular optics that aren't accessible. Like for instance, as an example giving Recon the option to use the 8x optics for weapons like the M16A4 to promote it as an SPR for recon, and giving them access to match grade ammo for it as well but no other classes. Making it more akin to a Mk12 SPR.
And giving the Bolt Action Sniper Rifles and DMR's (for Recon class only) access to 15x optics and maybe even up to 20x optics (but making these expensive loadoutpoint-wise) so it's a conscious decision to choose these optics as a central part of the loadout.
This style of class-only attachments could be used to also restrict existing attachments for certain classes to promote the class-role further and balancing, like making the magazines that hold more than 50 rounds only accessible to the Support class (effectively not affecting things such as the P90, but adding an exception for the SMG class of weapons so ones like the SL9 doesn't get affected etc).
This would be an excellent way to give better class-feeling as they would feel like more than gadget-variation only.